Spring



July 1s ,1924. 1,501,220

E. KREISSIG Filed Jan. 15 1924 afa-2:51

OFFICE Patented -my 15, 1924.-

`piensa' marxisme,v or Uranium,

' SPRING.

'Application med January 15, 1924. .serial no. ssaass.

To all whom t may. concew-I:

I 3e it known that I, ERNST. K REIssIe, a cltizen of the German Republic, and residing at Uerdingen, Germany, have inventedv certain new and useful, Improvements in Springs, of which the following is a specilication.

'The present invention relates to a 'new type of spring which differs from those heretofore known in that, contrary to the existing flexional and torsional springs, it will operate under tensonal or compressive strains only, or under both kinds of strains simultaneously.'

In the accompanying drawing Fig. 1 is a longitudinal cross section through a spring accordingto the present invention. Fig. 2

is a cross-section through thelspring according to the present invention.

According Ato the present invention .the

spring is composed of at least two helical members n, and lo lformed alternately with inner and outer conical surfaces in telescoping engagement with one another, the ends of which helices are prevented from tangential movementr In the example shown one end a: of the outer helical member n is rigidly secured to a tubular member p, and the other end q of the member In. is formed with a longitudinal groove wengaged by a feather s secured to the tubular member In a similar way one end z of the inner Kelical member o is rigidly secured to atubular member u,'while the opposite end t is formed with a oove 'v engaged by a feather w secured to t e tubular member u. p

If now an axial pressure is exerted on the system the deformation of the helical members can not cause an increase or a reductionk of the turns of the helical members. Therefore the individual windings are respectively extended or compressed, so that the turns of the helical members are subject only to tension or compression strains.

- The bending strains are very small and pracnected lwith that of the other one that the' tangential strains are balanced. The spring effect is several times greater than with any other known type of spring, as the capacity of the spring according to the present 1nv ention is, for a given volume, at least three tlmes as great as with the best liexional or torsional spring known. p I

The taper of the conical lsurfaces should be such that the spring will, by all means, return `into its original'position, as far as the friction between the conical surfaces is concerned. The latter will, on the spring returning, have a very effective braking inluence which will be of great advantage, particularly with buffer springs. Itis obvlous that also several such systems may be disposed within each other so that it will be possible to obtain a hereto un-` known higEh spring effect within a very small or the :outer or the inner helical volume. members also non-elastic parts which have a merely radial e'ect may be substituted, so that only one member has the spring effect.

It is obvious that in order to prevent the tangential movement of the ends of the i end of the respective helical member and connected to the opposite end of the latter to permit sliding movement` thereof in an axial direction only. A

2. A spring comprising a plurality of helical members formed respectively internally and externally with conical faces, the

conical faces vof each member tapering in opposite directions, andy the members being in telescoping engagement with corresponding conical faces, and means carried by each 'y helical member independent of the companion helical member for holding both ends of the respective member against relative rotary movement. v

3. A spring'comprising interior and exterior sleeves, and a plurality of cooperating helical members interposed between the sleeves and each helical member being attached at each end to a respective sleeve to prevent only tangential movement.

4. A spring comprising inner and outer .helical members formed respectively internally and externally with conical faces in telescoping engagement with one another, inner and outer sleeves between which the helical members are interposed, the two ends i of each member being attached to the adjacent sleeve in order to prevent tangential movement. i

5. A spring comprising inner and outer helical members formed respectively internally and externally with conical faces in telescopingengagement with one another, an inner tubular member for the inner helicalmember and an outer tubular member for the outer helical member, each fixed to one end of the respective helical member and provided with a longitudinal groove engaged by the other end of said respectivo helical member.

In testimony whereof I ax my signature.

ERNST KREISSIG. 

